Heating device



Feb. 9 1926..

M. R. MAX

HEATING DEVICE Filed July 19, 1924 Patented Feb. 9, 1 9256.

UNITED STATES 1,512,300 PATENT OFIFKIE.

MARY R. MAX, OF I'ITTSBURGH, PENNSYLVANIA.

HEATING DEVICE.

Application filed July 19, 1924. Serial No. 727,029.

To all whom it may concern:

Be it known that I, MARY R. MAX, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny, Pennsylvania, have invented certain new and useful Improvements'in Heating Devices, of which the following is a specifica .tion.

tion or liquid that is being fed into the human body at a constant temperature, and

v such maintenance-at a uniform temperature is absolutely essential if proper results-of such treatment areto. be obtained. But in the prior art processes there have been nodevices which enabled the accomplishment of this result without much care and difficulty. For example in the Murphy drip treatment, -the-liquid after being heated to the desired temperature was maintained at this temperature during the drip feeding, by

watching,

surrounding the same with hot water bottles, etc.- Obviously such an apparatus is cumbersome and requires constant and careful manipulation.

One of the objects of the present invention is to supply an apparatus which is simf ple in construction and yet' will give positive control j-without requiring constant Other andfurther objects and advantages I of this invention will appear from the more detailed description set forth below, and particularly in connection with the drawing 'wherein there is set forth by way of example, and not by wayof limitation, one

- form that-the device may take and which is the preferred form tobe used. The drawingshows in Figure 1 a-plan view of the v device; in Figure 2-an 'end view of the device; and in Figure 3 the complete strucfture assembled and ready for use. And

while a specific embodiment of the devise will, be described asshown in the drawing,

. it will be unders'tobd that various changes therein may be made by those skilled in the art to which this invention appertains, without departing from: the spirit or scope of this invention.

The preferred form as shown m the draw- .celain tube.

ing sets forth a tube A preferably of glass through which the liquid to be heated flows from a source of such material such as the receptacle or container 1, to which it is conglass. This tube A is surrounded by a porcelain tube B which serves to protect the tube A. -A third tube C of insulating material which may be made of insulating material of any desired kind, is placed about the tube B, and acts-as a cover for the resistance wire coil D, preferably of nichrome wire which is placed about the tube B. The coil of wire D is supplied with the conven tional plug attachment E so that it may be attached to any desired source of current,

i nected by suitable tubing, also preferably of preferably 110 volt which allows of its use very widely. The other end of the tube A is connected by the usual glass and rubber current is then turned on, and the arrangement is such that the liquid in passing through the tube A will be heated to a uniform temperature, in the preferred case of 105 F. although this temperature may vary if desired depending upon the heating surface used, and even in' the case of use in protocylsis may vary from 103 to 108 F.

for example. When the current is on the temperature of the solution cannot exceed at '60 drops per minute. In the preferred case a very high resistance wire is used, there beingvabout 100 feet of enamel coated 108 F. when given at 40 drops per minute,

and it does not exceed 105 F.- when givenwire making about 400 turns about the pori The guage of the wire is preferably 26. i

The device illustrated is particularly valuable in enteroclysis wherein a solution is given to the rectum to be absorbed by the bowel for medicinal purposes, by a drip process. In such use the .device heats the solution to approximately 105 F. after the rate of flow has been properly regulated so that the solution will reachthe bowel at the proper temperature, and will readily maintain the solution at that temperature.

Valves orstopcocks or other similar devices may obviously be used with the apparatus either in the connection between the heating tube and the container, or between the heating tube'and the delivering tube, or at both places, to control the rate of flow of the solution through the apparatus.

Having thus set forth my invention, I claim:

A heating device for liquids used in enteroclysis and protoclysis which consists of an inner glass tube for receiving the liquid to be heated, a porcelain tube surrounding the said glass tube to protect the same, a

ribbon conductor wound on the said poi celain tube. and an insulating cover about said coil of wire, and means for attaching the coil of Wire to a source of electric current, a valve for feeding the liquid to be heated to the glass tube at the rate of from 40 to 60 drops per minute, the relation between the heating and conducting surfaces of the device being such that the temperature of the liquid passing through the apparatus at the rate set forth will not vary from the limits of 103 to 108 F.

MARY R. MAX. 

